Lithium ion battery project background

  Lithium-ion battery is an indispensable energy storage product that drives human modern life, Lithium ion batteries are indispensable for daily communication, energy storage, household appliances, electric vehicles, electric ships, etc. And in special applications such as military, deep sea, and mining, lithium-ion batteries are characterized by their high energy density, long service life, and superior safety performance, Widely replaced the traditional lead-acid batteries, nickel-metal hydride batteries and other previous generation products.

Mabatire a lithiamu-ion ndi makampani opanga ukadaulo, Kukula kwamakampani kungathenso kulimbikitsa chitukuko cha mafakitale opanga zida ndi zida za mdziko. Ukadaulo wotsogola wa membrane, ukadaulo wa mzere wodziyimira pawokha, mame otsika komanso ukadaulo wapamwamba wamlengalenga ndi zida zofananira zomwe zimagwiritsidwa ntchito popanga batire ya lithiamu ion, ili ndi chitsogozo chabwino komanso gawo lowonetsera pakukula kwaukadaulo ndi zida zina zamafakitale. Zida zomwe zimagwiritsidwa ntchito m'mabatire a lithiamu-ion zimatha kuphatikizidwa ndi miyala yamkuwa yamkuwa, miyala ya cobalt ndi miyala ya graphite kuti ikhale yozama kwambiri muzojambula zamkuwa zowonda kwambiri zamabatire a lithiamu-ion, lithiamu cobaltate (lithium nickel cobalt manganate) zida za cathode, ndi mkulu- mphamvu graphite anode zipangizo.

Ngakhale mabatire a lithiamu-ion panopa ndi mtundu wotchuka kwambiri wa batri, ndi chitukuko cha teknoloji, pali mitundu yambiri ya mabatire a lithiamu-ion, iliyonse ili ndi ubwino wake ndi zovuta zake. Komabe, pazonse, mabatire a lithiamu-ion ali ndi zabwino ndi zovuta zotsatirazi:

1. Ubwino wa mabatire a lithiamu-ion.

(1) Magetsi apamwamba: Mphamvu yogwira ntchito ya batri imodzi imatha kufika pamtunda wa 3.7-3.8V (magetsi apamwamba kwambiri a selo akhoza kulipiritsidwa mpaka 4.2V), yomwe ili katatu kuposa mabatire a Ni Cd ndi Ni-H.

(2) Mphamvu zenizeni zenizeni: Pakali pano, mphamvu yeniyeni yeniyeni yomwe ingapezeke ndi pafupifupi 555Wh / kg, zomwe zikutanthauza kuti zinthuzo zimatha kufika pamlingo wina woposa 150mAh / g (3-4 nthawi Ni Cd, 2-3). times Ni MH), yomwe ili pafupi ndi 88% ya mtengo wake wongoyerekeza.

(3) Moyo wautali wozungulira: nthawi zambiri ukhoza kufika nthawi zoposa 500, kapena nthawi zoposa 1000, ndipo lithiamu iron phosphate imatha kufika nthawi zoposa 2000. Kutalika kwa moyo wa mabatire omwe ali m'zida zocheperako zomwe zimatulutsidwa kuwirikiza kupikisana kwawo.

(4) Kuchita bwino kwachitetezo: kulibe kuipitsidwa, palibe kukumbukira. Monga momwe adakhazikitsira Li-ion, mabatire a lithiamu-ion achepetsa malo awo ogwiritsira ntchito chifukwa cha mapangidwe a dendrites ndi maulendo afupiafupi omwe amayamba chifukwa chazitsulo zachitsulo. Li-ion ilibe zinthu zomwe zimaipitsa chilengedwe monga cadmium, lead, ndi mercury. Chotsalira chachikulu cha mabatire ena a Ni Cd munjira zina (monga sintering) ndi "memory effect", yomwe imaletsa kwambiri kugwiritsa ntchito mabatire. Komabe, Li-ion alibe vuto ili nkomwe.

(5) Kudzitulutsa pang'ono: Mlingo wodzitulutsa wa Li ion, womwe umakhala wokwanira kutentha kutentha ndikusungidwa kwa mwezi umodzi, ndi pafupifupi 2%, wotsika kwambiri kuposa 25-30% ya Ni Cd ndi 30-35% ya Ni. ndi MH.

(6) Kuthamangitsa mwachangu ndi kutulutsa: Mphamvu imatha kufika kupitirira 80% ya mphamvu yodziwika pambuyo pa mphindi 30 zolipiritsa, ndipo tsopano mabatire achitsulo cha phosphate amatha kufika 90% ya mphamvu mwadzina pambuyo pa mphindi 10 zolipiritsa.

(7) Kutentha kwakukulu kogwira ntchito: Kutentha kwa ntchito ndi -25 ~ 55 ° C. Ndi kusintha kwa electrolyte ndi electrode yabwino, ikuyembekezeka kukula mpaka -40 ~ 70 ° C.

2. Kuipa kwa mabatire a lithiamu-ion

(1) Kukalamba: Mosiyana ndi mabatire ena omwe amatha kuwonjezeredwa, mphamvu ya mabatire a lithiamu-ion idzachepa pang'onopang'ono, osadalira kuchuluka kwa ntchito, koma yokhudzana ndi kutentha. Njira yotheka ndikuti kukana kwamkati kumawonjezeka pang'onopang'ono, kotero kumakhala kosavuta kuwonetsedwa muzinthu zamagetsi zomwe zimakhala ndi mafunde othamanga kwambiri. Kusintha graphite ndi lithiamu titanate kumawoneka kuti kumatalikitsa moyo.

(2) Kulephera kupirira kuchulukirachulukira: Pakuchulukirachulukira, ma ion a lithiamu ophatikizika kwambiri amatha kukonza mu latisi ndipo sangathe kumasulidwa, zomwe zingayambitse moyo waufupi wa batri ndi kupanga gasi kumayambitsa thovu la gasi.

(3) Kulephera kupirira kutayidwa: Pakutha kutulutsa, ma ion a lithiamu ochulukirapo amachotsedwa mu electrode, zomwe zingayambitse kugwa kwa lattice, kufupikitsa moyo, ndikuyambitsa kutulutsa mpweya, zomwe zimapangitsa kuphulika kwa mpweya.

(4) Njira zambiri zotetezera zimafunika: Chifukwa chakuti kugwiritsa ntchito molakwika kungachepetse moyo komanso kumayambitsa kuphulika, njira zambiri zotetezera zawonjezeredwa ku mapangidwe a mabatire a lithiamu-ion.

Dera lodzitchinjiriza: kupewa kuchulukirachulukira, kutulutsa, kuchulukira, komanso kutentha kwambiri.

Port exhaust: kupewa kuthamanga kwambiri mkati mwa batire.

Makhalidwe a diaphragm: Ili ndi kukana kwamphamvu kwambiri kuti iteteze mabwalo amkatikati; Pamene kutentha kwa mkati mwa batri kuli kwakukulu kwambiri, kumatha kusungunuka, kuteteza ma lithiamu ions kuti asadutse, kutsekereza machitidwe a batri, ndikuwonjezera kukana kwa mkati (mpaka 2kQ).

Mwachidule, chitukuko cha mafakitale a batri ya lithiamu-ion ndi makampani amphamvu omwe amalimbikitsa mayiko omwe akutukuka kumene kumayiko otukuka kwambiri.